Door back for a safe



FIG. 1 is a right front perspective view of an ornamental design for adoor back for a safe according to the present invention;

FIG. 2 is a front view of the door back for a safe shown in FIG. 1;

FIG. 3 is a right side view of the door back for a safe shown in FIG. 1;

FIG. 4 is a left side view of the door back for a safe shown in FIG. 1;

FIG. 5 is a top view of the door back for a safe shown in FIG. 1; and,

FIG. 6 is a bottom view of the door back for a safe shown in FIG. 1.

The portions of the drawing shown in broken lines representenvironmental structure and form no part of the claimed design.

The ornamental design for a door back for a safe, as shown anddescribed.